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Sensors 2015, 15(8), 19157-19180; doi:10.3390/s150819157

Decision Fusion with Channel Errors in Distributed Decode-Then-Fuse Sensor Networks

1
School of Marine Science and Technology, Northwestern Polytechnical University,127 Youyi West Road, Xi'an 710072, China
2
School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
*
Author to whom correspondence should be addressed.
Academic Editor: Leonhard M. Reindl
Received: 13 April 2015 / Revised: 19 July 2015 / Accepted: 30 July 2015 / Published: 5 August 2015
(This article belongs to the Section Sensor Networks)
View Full-Text   |   Download PDF [498 KB, uploaded 5 August 2015]   |  

Abstract

Decision fusion for distributed detection in sensor networks under non-ideal channels is investigated in this paper. Usually, the local decisions are transmitted to the fusion center (FC) and decoded, and a fusion rule is then applied to achieve a global decision. We propose an optimal likelihood ratio test (LRT)-based fusion rule to take the uncertainty of the decoded binary data due to modulation, reception mode and communication channel into account. The average bit error rate (BER) is employed to characterize such an uncertainty. Further, the detection performance is analyzed under both non-identical and identical local detection performance indices. In addition, the performance of the proposed method is compared with the existing optimal and suboptimal LRT fusion rules. The results show that the proposed fusion rule is more robust compared to these existing ones. View Full-Text
Keywords: decision fusion; channel errors; average bit error rate; likelihood ratio test; decode-then-fuse; sensor networks decision fusion; channel errors; average bit error rate; likelihood ratio test; decode-then-fuse; sensor networks
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Yan, Y.; Wang, H.; Shen, X.; Zhong, X. Decision Fusion with Channel Errors in Distributed Decode-Then-Fuse Sensor Networks. Sensors 2015, 15, 19157-19180.

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